1 (* Copyright (C) 2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 val metas_of_proof_time : float ref
31 (Cic.term * (* type *)
32 Cic.term * (* left side *)
33 Cic.term * (* right side *)
34 Utils.comparison) * (* ordering *)
35 Cic.metasenv * (* environment for metas *)
36 Cic.term list (* arguments *)
39 | NoProof (* no proof *)
40 | BasicProof of Cic.term (* already a proof of a goal *)
41 | ProofBlock of (* proof of a rewrite step *)
42 Cic.substitution * UriManager.uri * (* eq_ind or eq_ind_r *)
43 (Cic.name * Cic.term) * Cic.term * (Utils.pos * equality) * proof
44 | ProofGoalBlock of proof * proof
45 (* proof of the new meta, proof of the goal from which this comes *)
46 | ProofSymBlock of Cic.term list * proof (* expl.named subst, proof *)
47 | SubProof of Cic.term * int * proof
48 (* parent proof, subgoal, proof of the subgoal *)
50 type environment = Cic.metasenv * Cic.context * CicUniv.universe_graph
52 (** builds the Cic.term encoded by proof *)
53 val build_proof_term: ?noproof:Cic.term -> proof -> Cic.term
55 val string_of_proof: proof -> string
57 val filter : Cic.substitution -> Cic.metasenv -> Cic.metasenv
59 exception MatchingFailure
61 (** matching between two terms. Can raise MatchingFailure *)
63 Cic.metasenv -> Cic.metasenv -> Cic.context -> Cic.term -> Cic.term ->
64 CicUniv.universe_graph ->
65 Cic.substitution * Cic.metasenv * CicUniv.universe_graph
68 special unification that checks if the two terms are "simple", and in
69 such case should be significantly faster than CicUnification.fo_unif
72 Cic.metasenv -> Cic.metasenv -> Cic.context -> Cic.term -> Cic.term ->
73 CicUniv.universe_graph ->
74 Cic.substitution * Cic.metasenv * CicUniv.universe_graph
78 scans the context to find all Declarations "left = right"; returns a
79 list of tuples (proof, (type, left, right), newmetas). Uses
80 PrimitiveTactics.new_metasenv_for_apply to replace bound variables with
84 Cic.context -> ProofEngineTypes.proof -> int list * equality list * int
87 searches the library for equalities that can be applied to the current goal
89 val find_library_equalities:
90 HMysql.dbd -> Cic.context -> ProofEngineTypes.status -> int ->
91 UriManager.UriSet.t * (UriManager.uri * equality) list * int
94 searches the library for theorems that are not equalities (returned by the
97 val find_library_theorems:
98 HMysql.dbd -> environment -> ProofEngineTypes.status -> UriManager.UriSet.t ->
99 (Cic.term * Cic.term * Cic.metasenv) list
102 searches the context for hypotheses that are not equalities
104 val find_context_hypotheses:
105 environment -> int list -> (Cic.term * Cic.term * Cic.metasenv) list
108 exception TermIsNotAnEquality;;
111 raises TermIsNotAnEquality if term is not an equation.
112 The first Cic.term is a proof of the equation
114 val equality_of_term: Cic.term -> Cic.term -> equality
117 Re-builds the term corresponding to this equality
119 val term_of_equality: equality -> Cic.term
121 val term_is_equality: Cic.term -> bool
123 (** tests a sort of alpha-convertibility between the two terms, but on the
125 val meta_convertibility: Cic.term -> Cic.term -> bool
127 (** meta convertibility between two equations *)
128 val meta_convertibility_eq: equality -> equality -> bool
130 val is_weak_identity: environment -> equality -> bool
131 val is_identity: environment -> equality -> bool
133 val string_of_equality: ?env:environment -> equality -> string
135 val metas_of_term: Cic.term -> int list
136 val metas_of_proof: proof -> int list
138 (** ensures that metavariables in equality are unique *)
139 val fix_metas: int -> equality -> int * equality